Automatic machine tool



March 18, 1930. w. s. DAVENPORT ET AL 1,750,836

AUTOMATIC MACHINE TOOL Filed Feb. 15, 1926 8 Sheets-Sheet 1 INVENTORlmhmdlzkvezzpari mm 4/]. 7' 102m- 5790:) ATTOR N EYfl March 3 w. s.DAVENPORT ET AL I 1,750,836

AUTOMATIC MACHINE TOOL Filed Feb. 15, 1926 8 Sheets-Sheet 2 R: BY 7/:

aid r ATTORNEYQ March 18, 1930.

W. S. DAVENPORT ET AL AUTOMATI C MACHINE TOOL Filed Feb. 15 1926 8Sheets-Sheet v 3 f r 08 5 Rwo m m R J. 0 mm M 1 (fl ZN 4 \RN WK wk March18, 1930. w. s. DAVE-NPORT ET AL AUTOMATIC MACHINE TOOL 8 66;) ATTOR NEY S W. S. DAVENPORT ET AL AUTOMATIC MACHINE TOOL 8 Sheets-Sheet 5 FiledFeb. 13, 1926 March 18, 1930.

BY I

March 18, 1930. w. s. DAVENPORT ET AL AUFQMATIC MACHINE TOOL Filed Feb.13, 1926 8 Sheets-Sheet 6 a'mMTToRNEYa March 1939- w. 25. ET ALAUTDMATIC MACHINE TOOL 8 Sheets-Sheet Filed Feb. 15, 1926 Patented Mar.18, 193D v UNITED STATES PATENT oFF c-e,

WILLIAM S; DAVENPORT AND WILLIAM .A. THOMAS, OF 'ROCHESTER, NEW YORK,

ASSIGNORS TO DAVENPORT M CHINE TOOL CO., INC, ROCHESTER, NEW.YOBK,

A CORPORATION I v 7 I 'AUTOMATIC MACHINE TOOL Application filed Februaryis, 1926. Serial No. 88,042.

The present invention relates to automatic On this bed are arranged twohousings or machine tools and an object thereof is to proframe pieces 2and 3, the housing or frame videa construction in which two rotary headspiece 2 being preferably cast integral with each having a set of toolsprojecting toward the bed and the housing or frame piece 3 5 the otherset and axially movable thereon, being adjustable horizontally on thebed'to- 55 are connected by a partwhich causes the ward or from theframe'piece 2. In this inheads to turn together and which acts asstance, the bed 1 has horizontal 'guides'4 and a support for worksimultaneously operated the housing or frame piece 3 carries bolts 5upon by the two sets of tools. A further which secure the housing orframe piece to object of the invention is to provide an autothe bed in afixed position with reference to 0 matic tool machine having a hollowrotary the housing or frame piece 2. v head on which the tool spindlesare rotat- Mounted to turn in the frame pieces or able and axiallymovable, combined with housings 2 and 3, respectively, are two reworkholding devices which turn with the vo lving tool spindle heads orcarriers 6 and head to hold the work in cooperation with 7. Turning withthese heads, respectively, 5 the tool and are controlled by meansextendand bolted thereto at 8 are two slide brackets ing throughthe'hollow rotary head and oper-- 9 and 10. Each of these slide'bracketshas ated in turn by means at the opposite end of guides 11 mountedthereon and supporting the head. slides 12 eachof which carries a roller13..

To these and other ends, the invention conmovable in a cam Way 14 formedon the houssists of certain parts and combinations of ings 2 or 3 toshift the slides 12 in order to parts, all of which will be hereinafterdeoperate the drill spindles 15 back and forth. scribed, the novelfeatures being pointed out The drill spindles .15 are, in this instance,in the appended claims. mounted to rotate upon and to slide axially I thd in f Y on the revolving heads 6 and 7, and each 75 Fig. 1 is a planview of a machine conis formed at its outer end with an annular structedin accordance with this invention; groove 16 in which a projection oryoke 17 Fig. 2 is a front view of the machine; on the slide 12 operates,so as to cause' the Fig. 3 is a longitudinal section through the dIlllS18 to move toward and from the work.

hi The depth, of the cut of each drill is ,deter- 80 Fig. 4: is an endView of the machine; mined by adjusting the two parts of each Fig. 5 isa view of the opposite end of the shde 12 by means of an adjusting screw19. machine with parts broken away; The turning of the heads 6 and 7 maybe Fig. 6 is a view of the frame of the maeffected in any suitablemanner as through p j chine, illustrating the driving mechanism for aring gear 20 Wl11Cl1 is secured by bolts 21 85 the spindles and rotarycarrier or turret with o the head 6, the head 6 being connected withparts in section; a head 7 through atubular connection22, the Fig. 7 isan enlarged section on the line ends of which are formed with annularribs 1 7-7, Fi 1; 23 seatedm grooves in the heads 6 and 7 Fig.8 is anenlarged section on th lin and held in such seats by bolts 24 making it99 8-8, Fig. 1; 7 possible to remove this tubular member 22,

Fi 9 d 10 are d tail views f th k another functlon for wh ch willhereinafter holding means; and be set forth. With the ring gear 20 mayen- Fig. 11 is a detail view of one of the clampg ge a Worm 25 which hason the shaft thereingdevices showing the shaft on which it is of abevelled gear 26, meshing with the bev 95 mounted and the operatinglever at the oppoelled gear v27 on a shaft 28- extending longisite end.tudinally of the bed frame.

Referring more particularly to the draw- This shaft 28 has at itsopposite end a gear ings, 1 indicates the bed of the machine 29 arrangedin the housing 30 which also which may be of any suitable construction.encloses a gear 31, the gear 31 being mounted on a stub shaft 32 whichis adjustable i n a slot 33 of a swinging bracket 34 also mounted "inthe housing 30. The gear 31 meshes with a gear 35 on the driving shaft36. The purpose of this gearing in the housing is to make it possible toobtain different speeds of head rotation. The gears 31 and are removableso that gears of other sizes may be fitted in place to obtain differentspeeds. I

The shaft 36 has a movable clutch member 37 thereon-adapted to engagewith the clutch surface on a gear 38 and controllable through a yoke 39which is operated by a hand or feed starting lever ,40 onvthe'oppositeside of the machine. This shaft 36 may also be turned by handthrough a handwheel 41 at the front of the machine on a shaft 42extending to the rear andhaving a bevelled gear 43 thereon meshing withthe bevelled gear 44 on the shaft 36 permitting the turning of therevolving head by hand,provided,of course, the clutch 37 is not inconnection with the gear 38.: The gear 38 meshes with a inion 45 onadrive'shaft50 on which the drive pulley 51 is arranged, the drive pulleybeing driven in any suitable manner.

The driving of the spindles may be effected in any suitable manner asfrom the shaft by a gear 52 on said shaft meshing with the gear 53 onthe spindle drive shaft 54. This spindle drive shaft 54 carriestwo'gears 55 and 55*,the former of which meshes with. one of two ringgears 56, each ring gear having teeth on its annular andexternalperimeters, theexterna'l teeth engaging the gear 55 and theinternal teeth engaging pinions 57-. The other gear 55 meshes with gear55' on a stub shaft 55 which carries a gear 55 meshing with the otherringgear 56.

The tubular member 22 acts as a jig holder for the jigs or workholder's. To this end the tubular member 22 has its walls flattened at58 to provide seats for the jig. plates 59. These jigs or work holdersof which one is shown in detail are shown in Figs. 9 and 10. Each jigplate 59 has an arm 60 extending laterally therefrom and work sup ortingor holding means on. one face thereo In this instance, the work shown at61 is a hinge plate in which two holes are to be drilledinoppositesides. The work rests in a V shaped groove 62 and also on astud 63. At one side the work holder has ,two adjustable screw abutments64 which define theposition of the work piece on the 'work holder. Inthis instance, the, work 61 is held on the work holder by two clampingmeans.

One of these clamping means is in the form of a clamping lever 65whichis pivoted at 66 to the arm 60 and carries at its free end a roller67 which cooperates with a fixed controlling member 68 in the form of aring cam. This ring cam has a depressed portion 69 which, when therollers 67 lie therein, permit the levers 65 to lie in non-clampingposition,

the work piece will be operated upon by the drill 18 and when the-clamps65 are in unclamping position, the drills will be with drawn from thework pieces. The other clamping devices 70 cooperate with the face ofthe work piece 61 and, in this instance, comprises an arm in the form ofa tapered pin driven into a shaft or rod 71 which is mounted to rock orturnin a hearing block 72 arranged within the tubular jig holder 22, thejig holder having an opening or slot 73 throughfwhich the clamping arm70 extends and there being provided five or these arms to correspond innumber to the number of work holders and drill spindles in each head 6or 7. The shafts 71 extend through the tool spindle head 6 to andthrough a block 74 which is fitted within the slide bracket 9 to one endof the machine. Each of these shafts 71 may be provided at the end ofthe machine with an arm 75 carrying a roller 76 which travels on'theinner faceof a cam or fixed member 77 arranged at the end of themachine. 7 This cam has a depressed portion 78 which whenthe rollers 75enter effects the swinging of the clamp 70 to release the work piece 61,but when the'rollers engage the high point of the cam, 77, the arms or,clamping members 70 areshifted toward the work piece 61., It is apparentthat the shafts 71, by being mounted on blocks 72 and 74 rigid with thetool spindleheads,revolve with the tool s indle heads or carrier, and,at the same. I 6

time, have motion about their own axes under the action of the arms 75.In this way,

while the tool revolving heads or carriers 6 and 7 are turning with thejig holder-7 2, the

work is clamped and released at certain periods, so that while thetools18 are operating on the work, it willbe held by the arms 70 and, aftersuch operation and withdrawal of the tools, the arms 7 0 will releasethe work. The arms 70 and the arms 65 cooperating with a single workpiece, engage'or release the work substantially at the same time.

In order that thedrills or tools 18 may be guided to the work piece 61,while it is held, the opposite-sides of the arm 60 are provided withopenings in which steel bushings 79 are arranged, these bushings beingsecured in place by set screws 80 and having openings 81 in which thedrills or tools-may pass.

In order to supply oil to the dr1lls,'an oil pump 82 is provided whichthrough a piping 85 in one end and the jig holder having a .bushing 86,both of these bushings turning on the pipingand the piping dischargingin a chamber 87 in the jig holder in the bushing 86 and the block. orhead 72, this chamber having discharge openings 88 directly opposite thedrills so that the oil flows on the work during the operation of thedrills or tools. A valve 89 in the pipin 83 controls the flow oflubricant to a charm er 87. The pump is driven in any suitable manner asby a chain 90 which connects with the'pulley 91 on a common shaft withthe gear 38.

The operation of the invention is as follows: The work piece 61, isplaced upon a work supporting arm while the clamping members and of saidarm are shifted to unclamping positions] and the drills or tools aremoved away from the work. The work support or jig holder during thistime is rotating slowly and, at the same time, all of the drills areturning, each drill operating upon a work piece in one of the workholders. Shortly after the work piece is laced upon a work holder, theclampin members 65 and 70 engage therewith to ho d the work to theworksupport in two directions. About this time the drills which are tooperate upon this work piece move axially toward the work piece and thisaxial movement continues while the work piece is revolving with thecarrier until the drilling operation is completed; after which thedrills are again withdrawn through the cams 14 and the jaws or clampingmembers release the work piece, permitting the latter to be dischargedby gravity due to the fact that the discharge point is at the .undersideof the revolving head. The clamps 65 are operated by a sta.-' tionarycam or element 68 surroundin the jig holder, whereas .the operation 0the clamps 7O areefiective through the rotation of the shafts 71arranged in annular series in the revolving head or carrier 6 andturning with the latter, so as to cause the roller 7 6 on the arm 75 toengage with a stationary cam 77 at one end of the machine. The drills 18move in and-out through the axial operation of the drill spindles bymeans of the cams 14 engaging rollers 13 on the slides 12, the spindlesbeing mounted on the revolving element or carrier formed by the twoheads 6 and 7 connected by the jig holder 22. During the operation ofthe tools or drills 18, lubricant is fed to the tools adjacent theirdrilling points by means of openings 88 in a chamber WVhat we claim asour invention and desire to secure by Letters Patent is:

1. An automatic machine tool comprising two rotary tool carrying heads,two spaced bearings surrounding said heads and in which said heads turnabout a common axis, means supporting one of said bearings so that itmay be moved .in the direction of the axislof rotation of its head,toward and from the other to vary the distance between the heads and awork supporting connection detachably secured to both of-the heads androtatable coaxially with the latter.

2. An automatic machine tool comprising a pair of rotary heads,aconnection between the heads causing the heads to turn together,

two sets of tools, one set being mounted on' 1 each head and each toolbeing rotatably and axially movable on the head, the tools of the twosets projecting toward. each other, and work holding devices arranged onthe connection between the. two heads and turning with said heads, eachwork holding device having a clamping member for holding a work piecewh1le a tool from both sets 0 erates thereon, and means forautomatically efiecting the operation of said clamping members, saidmeans comprising "a fixed ring shaped member surrounding the connectionbetween the-two heads between the ends of the latter.

3. An automatic machine tool comprising a bed, a fixed housing onthebed, an adjustable housing on the bed, two rotary tool spindle headsmounted to turn in the two housings, a detachable member connecting bothheads and rotatable coaxially with both" common axis, two sets of tools,each set being mounted on one of the heads, the tools of the two setsprojecting towards each other.

and being rotatably and axially movable on the heads, means permittingthe relative adjustment between the heads, a connectin member detachablyconnected tobothheads and rotatable with both heads about the axis ofrotation of said heads, a plurality .of work holding devices equal innumber to the number of tools in each set for holding work mounted 'onsaid connecting member for operation upon by both sets of tools, eachwork holding device having a pivoted clamping member-for holding a workpiece thereon, and fixed means surrounding. said connecting member andarranged in the path of travel of the work holding devices for effectingthe operation of said clamping member.

5. An automatic machine tool comprising a hollow rotary head, toolspindles rotatable and axially movable on said head about the axis ofrotation of the head, work holding devices turning with the head forholding the work for operation upon by the tools at one end-of the-head, controlling means'for said work holding devices extending throughthe ;;hollow head, and means at the end of the head opposite the-workholding devices for effecting the movement ofsaid controlling devices.

6. An automatic machine toolcom'prising a rotary hollow head, a'tubularmember se-' cured to the head,-wor k holding devices secured to thetubula'r member and having movable clamping members, tools mounted onthe head to turn: therewith and having rotary and axial movement on thehead to operate on work held by the work holding devices, a cam mountedin fixed relation to the rotary head on a side thereof opposite'thetubular member, oscillatoryv rods mountedin the head-to turn with'thehead and connected with the work holding clamps and with the fixed camso that the fixed cam effects the operation of the work holding clampsas the'head turns.

'17. An automatic machine tool comprising a rotary hollow head, ahollowslide bracket projecting from one side of the head, a hollowmember connected to the opposite side of the head, work, holdingdevices'mounted on said hollow member and each havinga work hold-r ingclamp, a slide movable on the slide brackl I ets, tool spindles mountedfor axial movement and rotary movement on the head and connectedwith theslides, a fixed cam by which said slides are moved for eflecting theaxial movement of the tools, means for turning the tools, a fixed cambeyond theend ofthe hollow slide bracket, rods mounted to turnwith therotaryhead and to oscillate, saidrods be ing each connectedatone endwith a clamp of a work holding. device, and means at the opposite end ofeach rod for effecting, the oscillation of the rod.

. 8. An automatic machine tool comprising a pair of rotary hollow heads,a hollow con- 'nection between the head, hollow slide bracketsvproject-ing front-the outer ends of the heads, work holding devicesmounted on the hollow connection and each having a work holding clamp,said hollow member having ing toward, each other to cooperate with thework pieces on'the work holdin devices, said tools being mounted foraxia and rotary movement on their, respective heads, slides mounted onthe slide brackets and connected and through one of the heads and one ofthe slide brackets for'eflecting the operation of the clamps of the work1101 ing devices.

-' 9. Anautomaticm'achine tool comprising a rotary hollow head,axially'movable and rotary tool spindles onwthe head, a gear on eachspindle, an annular rotary internal and external gear surrounding,the'tool spindles and'meshing with the, gears thereon'to turn saidspindles, work holding means at one end of the head,controlling meansfor the work holding means extending through the hollow head and theannular..gear, and meansfor driving the annulargear through the externalteeth.-

10. A machine tool "comprising a rotar'y hollow head, rotary toolspindles arranged about the-axis of rotation of the head and movable inthe direction parallel with the axis v I of rotation of the head, ahollow slide bracket projecting from the head opposite the end fromwhich the tools project, guides on-s'aid bracket, slides on thexguides,each connected to one of the spindles, a hollow member pro jecting fromthat end of the head from which.

the tools project, work holding means mounted on said "hollow member, ahousing surrounding the slide bracket and-formed with a cam cooperatingwith the slides to effect the axlal movementof the tools, and a secondcam carried by said housing and having con 'nection with the workholding means extend ing through said hollow slide bracket, hollowrotary head and hollow member at the tool opposite the end of th'ehead.f 11. An automaticmachin e tool comprisin a horizontally rotatable head,rotary tool k spindles arranged about the'axis of rotation of said headand movabie axially parallel 1 5 with the axis of rotation '0 said head,a slide bracket extending from said head opposite the end from which thetools extend, guides on said bracket, slides onthe guideseach connectedto one of the tool spindles, means cooperating with the slides foreffecting the axial movement .ofthe tools, a hollow member projectingfrom the head centrally of the.

tools and provided' with lubricant discharging openings, work holdingdevices-supported on saidhollow member,and non-rotating means forfeeding a lubricant through the slide bracket and the hollow rotary'headand into the hollow member tofeed the lubricant to the work holdingdevices on said hollow i WILLIAMS. DAVENPORT. -WILLIAM A, THOMAS. I

member.

with the tools fOrefi'ecting the axial movement of the tools, fixedmeans cooperating with the slides to efi'ect the movement of the slides,and means extending through one of the blocks in the hollowconnecting'member

